[vala/wip/gdk-pixbuf: 1/2] girparser: Handle anonymous delegate not backed by virtual-method or signal

[Rico Tzschichholz <ricotz src gnome org>]

commit 432b2ba977bd4f95530c0962978623eeb60e0bb1
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Jan 13 17:44:38 2021 +0100

    girparser: Handle anonymous delegate not backed by virtual-method or signal

 tests/Makefile.am                 |  1 +
 tests/gir/delegate-anonymous.test | 35 +++++++++++++++++++++++++++++++++++
 vala/valagirparser.vala           | 22 ++++++++++++++++++++++
 3 files changed, 58 insertions(+)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index bd4b19daa..bca714521 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -696,6 +696,7 @@ TESTS = \
        gir/class.test \
        gir/constant.test \
        gir/delegate-alias-without-target.test \
+       gir/delegate-anonymous.test \
        gir/delegate-array-length-type.test \
        gir/delegate-closure-destroy-index-conflict.test \
        gir/delegate-error-pos.test \
diff --git a/tests/gir/delegate-anonymous.test b/tests/gir/delegate-anonymous.test
new file mode 100644
index 000000000..0c4fd1626
--- /dev/null
+++ b/tests/gir/delegate-anonymous.test
@@ -0,0 +1,35 @@
+GIR
+
+Input:
+
+<record name="Foo" c:type="TestFoo">
+  <field name="bar_callback">
+    <callback name="bar_callback" throws="1">
+      <return-value transfer-ownership="none">
+        <type name="gpointer" c:type="gpointer"/>
+      </return-value>
+      <parameters>
+        <parameter name="func"
+                   transfer-ownership="none"
+                   closure="1">
+          <type name="GLib.SourceFunc" c:type="GSourceFunc"/>
+        </parameter>
+        <parameter name="user_data"
+                   transfer-ownership="none"
+                   nullable="1"
+                   allow-none="1">
+          <type name="gpointer" c:type="gpointer"/>
+        </parameter>
+      </parameters>
+    </callback>
+  </field>
+</record>
+
+Output:
+
+[CCode (cheader_filename = "test.h", has_type_id = false)]
+public struct Foo {
+       public weak Test.FooBarCallbackFunc bar_callback;
+}
+[CCode (cheader_filename = "test.h", has_target = false, has_typedef = false)]
+public delegate void* FooBarCallbackFunc (GLib.SourceFunc func) throws GLib.Error;
diff --git a/vala/valagirparser.vala b/vala/valagirparser.vala
index 65de9ea85..a46aa8fb5 100644
--- a/vala/valagirparser.vala
+++ b/vala/valagirparser.vala
@@ -1136,6 +1136,17 @@ public class Vala.GirParser : CodeVisitor {
                                                var d = ((DelegateType) field.variable_type).delegate_symbol;
                                                parser.process_virtual_method_field (this, d, 
parent.gtype_struct_for);
                                                merged = true;
+                                       } else if (field.variable_type is DelegateType) {
+                                               // anonymous delegate
+                                               var d = ((DelegateType) field.variable_type).delegate_symbol;
+                                               if (this.lookup (d.name).parent == this) {
+                                                       d.set_attribute_bool ("CCode", "has_typedef", false);
+                                                       if (d.has_target && !metadata.has_argument 
(ArgumentType.DELEGATE_TARGET)) {
+                                                               field.set_attribute_bool ("CCode", 
"delegate_target", false);
+                                                       }
+                                                       d.name = parent.symbol.name + 
Symbol.lower_case_to_camel_case (d.name) + "Func";
+                                                       get_parent_namespace (this).add_delegate (d);
+                                               }
                                        } else if (field.variable_type is ArrayType) {
                                                Node array_length;
                                                if (metadata.has_argument (ArgumentType.ARRAY_LENGTH_FIELD)) {
@@ -1598,6 +1609,17 @@ public class Vala.GirParser : CodeVisitor {
                return sym is ObjectTypeSymbol || sym is Struct || sym is Namespace || sym is ErrorDomain || 
sym is Enum;
        }
 
+       static unowned Namespace get_parent_namespace (Node node) {
+               unowned Node? n = node.parent;
+               while (n != null) {
+                       if (n.symbol is Namespace) {
+                               return (Namespace) n.symbol;
+                       }
+                       n = n.parent;
+               }
+               assert_not_reached ();
+       }
+
        UnresolvedSymbol? parse_symbol_from_string (string symbol_string, SourceReference? source_reference = 
null) {
                UnresolvedSymbol? sym = null;
                foreach (unowned string s in symbol_string.split (".")) {